Kudos for the Sixth Sense-- best "twist" ending of all times.
Or maybe the second best twist ending. I think I like the ending of
The Thirteenth Floor (a science fiction movie) better. It wasn't a creepy or even emotionally engaging movie like
Sixth Sense, but it engaged you on a very cerebral level trying to figure out what was going on. Comparisons will be made to the much more commercially successful
Matrix, but I prefer
Thirteenth Floor.